lzma-sys build fails on OpenSUSE 42

I'm very new to rust, trying to build the [AVR Rust fork](https://github.com/avr-rust/rust), and it's failing when building lzma-sys.

I *think* the issue is with this package; if not, could you point me in the right direction? I'm following the instructions to build the compiler and it's failing here:

```
$ make
...
error: could not find native static library `lzma`, perhaps an -L flag is missing?

error: Could not compile `lzma-sys`.
warning: build failed, waiting for other jobs to finish...
error: build failed
...
```

In OpenSUSE, the lib dir defaults to lib64. If I make a symlink, the build can proceed:

```
$ cd ./build/x86_64-unknown-linux-gnu/stage0-tools/x86_64-unknown-linux-gnu/release/build/lzma-sys-b5e13e4c4ffea1be/out
$ ls -l
total 4
drwxr-xr-x 1 alexh users 160 Jan 8 11:40 build
drwxr-xr-x 1 alexh users 20 Jan 8 11:40 include
drwxr-xr-x 1 alexh users 56 Jan 8 11:40 lib64
drwxr-xr-x 1 alexh users 526 Jan 8 11:40 src
$ ln -s lib64 lib
$ cd -
$ make
...
Compiling lzma-sys v0.1.8
...
```